One thing I certainly agree with the two of you on and that it's inappropriate in a professional setting. It's inappropriate for a female boss to a female employee but even more so from a male boss to a female employee! That's what I would call "condesending" I guess.

I use one in a sarcastic tone to that male person that comes over from time to time. I say "Yes, DEAR."

I'm gonna have to think more on the rest.